Electronic clock
US6069846A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 1998 |
| Grant date | May 30, 2000 |
| Priority date | — |
| Expiry date | Oct 5, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04G19/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic watch comprises electric power generator (10) for generating electric energy from external energy, electric power storage means (30) for storing the electric energy generated, and clock means (20) for executing time display operation by use of the electric energy supplied from the electric power generator (10) or electric power storage means (30). The electronic watch is further provided with arithmetic means (80) for calculating a ratio of a voltage generated by the electric power generator (10) to a voltage of the electric energy stored by the electric power storage means (30), switching circuit (40) for executing connection or disconnection among the electric power generator (10), electric power storage means (30), and clock means (20), and controller (50) so that connection or disconnection within the switching circuit (40) can be controlled by controller (50) according to the ratio as calculated by the arithmetic means (80).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.